| 发明名称 |
METHOD FOR THE PRODUCTION OF POLYURETHANE FOAM |
| 摘要 |
The present invention is related to a method for the production of polyurethane foam, comprising the steps of: (1) providing an isocyanate-reactive component A comprising a polyol component A1 which further comprises a physical blowing agent T; (2) combining at least the isocyanate-reactive component A and an isocyanate component B, thereby obtaining a polyurethane reaction mixture; (3) providing the polyurethane reaction mixture in a cavity (11); and (4) reducing the pressure within the cavity (11) to a pressure lower than ambient pressure. The method is characterized in that the cavity (11) is ventilated to ambient pressure before the gel time of the polyurethane reaction mixture is reached. |
| 申请公布号 |
US2017096539(A1) |
申请公布日期 |
2017.04.06 |
| 申请号 |
US201615332950 |
申请日期 |
2016.10.24 |
| 申请人 |
Covestro Deutschland AG |
发明人 |
Albers Reinhard;Heinemann Torsten;Vogel Stephanie;Loof Michael;Gu Zhihong;Urano Atsushi;Sangjo Suk;Shihu Zhao |
| 分类号 |
C08J9/14;C08G18/48;C08G18/42;C08G18/18 |
主分类号 |
C08J9/14 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for the production of a polyurethane foam, comprising the steps of:
providing an isocyanate-reactive component A comprising a polyol component A1 which further comprises a physical blowing agent T; combining at least the isocyanate-reactive component A and an isocyanate component B, thereby obtaining a polyurethane reaction mixture; providing the polyurethane reaction mixture in a cavity; and reducing the pressure within the cavity to a pressure lower than ambient pressure, wherein the pressure is reduced by ≧1 mbar up to 900 mbar;wherein the cavity is ventilated to ambient pressure before the gel time of the polyurethane reaction mixture is reached. |
| 地址 |
Leverkusen DE |
